<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图 -->
    <el-card>
      <!-- 添加角色嗯钮区域 -->
      <el-row>
        <el-col>
          <el-button type="primary" @click="addDialogVisible = true"
            >添加角色</el-button
          >
        </el-col>
      </el-row>
      <!-- 角色列表区 -->
      <el-table :data="rolelist" border stripe>
        <!-- 展开列 -->
        <el-table-column type="expand">
            <template slot-scope="scope">
                <el-row :class="['bdbottom',index1 ===0 ? 'bdtop' : '' ,'vcenter']" v-for="(item1,index1) in scope.row.children" :key="item1.id">
                    <!-- 渲染一级权限 -->
                    <el-col :span="5">
                        <el-tag  closable @close="removeRightById(scope.row,item1.id)">{{item1.authName}}</el-tag>
                        <i class="el-icon-caret-right"></i>
                    </el-col>
                    <!-- 渲染二，三级权限 -->
                    <el-col :span="19">
                        <!-- 通过for循环嵌套渲染二级权限 -->
                        <el-row :class="[index2 ===0 ? '':'bdtop','vcenter']"v-for="(item2,index2) in item1.children" :key="index2">
                            <el-col :span="6">
                                <el-tag   closable @close="removeRightById(scope.row,item2.id)"type="success">{{item2.authName}}</el-tag>
                                <i class="el-icon-caret-right"></i>
                            </el-col> 
                            <el-col :span="18">
                                <el-tag  type="warning"
                                 v-for="(item3,index3) in item2.children" 
                                 :key="index3"
                                 closable
                                 @close="removeRightById(scope.row,item3.id)"
                                 > {{item3.authName}} </el-tag>
                            </el-col>
                        </el-row>
                    </el-col>
                </el-row>
            </template>
        </el-table-column>
        <!-- 索引区 -->
        <el-table-column label="#" type="index"></el-table-column>
        <el-table-column label="角色名称" prop="roleName"></el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
        <el-table-column label="操作">
          <template slot-scope="scope" width="300px">
            <el-button
              size="mini"
              type="primary"
              icon="el-icon-edit"
              @click="showEditDialog(scope.row.id)"
              >编辑</el-button
            >
            <el-button
              size="mini"
              type="danger"
              icon="el-icon-delete"
              @click="removeRolebyId(scope.row.id)"
              >删除</el-button
            >
            <el-button size="mini" type="warning" icon="el-icon-setting"
            @click="showSetRightDialog(scope.row)"
              >分配权限</el-button
            >
          </template>
        </el-table-column>
      </el-table>
    </el-card>

    <!-- 添加角色的对话框 -->
    <el-dialog
      title="添加角色"
      :visible.sync="addDialogVisible"
      width="50%"
      @close="addDialogClosed"
    >
      <!-- 内容主体区域 -->
      <el-form
        ref="addFormRef"
        :rules="addFormRules"
        :model="addForm"
        label-width="80px"
      >
        <el-form-item label="角色名称" prop="roleName">
          <el-input v-model="addForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="活动名称" prop="roleDesc">
          <el-input v-model="addForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <!-- 底部区域 -->
      <span slot="footer" class="dialog-footer">
        <el-button @click="addDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addRoles">确 定</el-button>
      </span>
    </el-dialog>

    <!-- 修改角色的对话框 -->
    <el-dialog
      title="修改角色"
      :visible.sync="editDialogVisible"
      width="50%"
      @close="editDialogClosed"
    >
      <!-- 内容主体区域 -->
      <el-form
        ref="editFormRef"
        :rules="editFormRules"
        :model="editForm"
        label-width="80px"
      >
        <el-form-item label="角色名称" prop="roleName">
          <el-input v-model="editForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="活动名称" prop="roleDesc">
          <el-input v-model="editForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <!-- 底部区域 -->
      <span slot="footer" class="dialog-footer">
        <el-button @click="editDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="editRoleInfo()">确 定</el-button>
      </span>
    </el-dialog>

    <!-- 分配权限对话框 -->
        <el-dialog
    title="分配权限"
    :visible.sync="setRightDialogVisable"
    width="50%"
    @close="setRightDialogClosed"
    >
    <!-- 树形控件 -->
    <el-tree :data="rightslist" :props="treeProps" show-checkbox node-key="id"
    default-expand-all :default-checked-keys="defKeys" ref="treeRef"></el-tree>

    <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisable= false">取 消</el-button>
        <el-button type="primary" @click="allotRights">确 定</el-button>
    </span>
    </el-dialog>

  </div>
</template>

<script>
export default {
  data() {
    return {
      //所有角色列表数据
      rolelist: [],
      //控制对话框显示与隐藏
      addDialogVisible: false,
      //添加用户表单
      addForm: {},
      //添加表单的验证对象
      addFormRef: {},
      //添加用户表单数据
      addForm: {
        roleName: '',
        roleDesc: ''
      },
      //添加表单验证规则
      addFormRules: {
        roleName: [
          { required: true, message: '请输入角色名称', trigger: 'blur' },
          {
            min: 2,
            max: 5,
            message: '角色的长度在2~5个字符之间',
            trigger: 'blur'
          }
        ],
        roleDesc: [
          { required: true, message: '请输入角色描述', trigger: 'blur' },
          {
            min: 3,
            max: 10,
            message: '角色描述的长度在3~10个字符之间',
            trigger: 'blur'
          }
        ]
      },
       //   控制修改对话框的显示和隐藏
       editDialogVisible: false,
      //查询到的用户信息对象
      editForm: {},
      //修改表单验证对象
      editFormRules: {
        roleName: [
          { required: true, message: '请输入角色名称', trigger: 'blur' },
          {
            min: 2,
            max: 5,
            message: '角色的长度在2~5个字符之间',
            trigger: 'blur'
          }
        ],
        roleDesc: [
          { required: true, message: '请输入角色描述', trigger: 'blur' },
          {
            min: 3,
            max: 10,
            message: '角色描述的长度在3~10个字符之间',
            trigger: 'blur'
          }
        ]
      },
      //控制分配权限对话框的显示与隐藏
      setRightDialogVisable: false,
      //所有数据权限
      rightslist:[],
      //树形控件的属性绑定对象
      treeProps:{
          label:'authName',
          children:'children'
      },
      //默认选中节点id值数组
      defKeys:[],
      //当前即将分配权限的id
      roleId:''
    }
    
  },
  created() {
    this.getRoleList()
  },
  methods: {
    //获取所有角色的列表
    async getRoleList() {
      const { data: res } = await this.$http.get('roles')
      if (res.meta.status !== 200) {
        return this.$message.error('获取角色列表失败！')
      }
      this.rolelist = res.data
      console.log(this.rolelist)
    },
    // 监听添加用户对话框的关闭事件
    addDialogClosed() {
      this.$refs.addFormRef.resetFields()
    },
    // 点击按钮，添加新角色
    addRoles() {
      this.$refs.addFormRef.validate(async valid => {
        if (!valid) return
        // 可以发起添加用户的网络请求
        const { data: res } = await this.$http.post('roles', this.addForm)

        if (res.meta.status !== 201) {
          this.$message.error('添加角色失败！')
        }

        this.$message.success('添加角色成功！')
        // 隐藏添加用户的对话框
        this.addDialogVisible = false
        // 重新获取用户列表数据
        this.getRoleList()
      })
    },
    //删除用户信息
    async removeRolebyId(id) {
      //弹框询问是否删除
      const confirmResult = await this.$confirm(
        '此操作将永久删除该用户, 是否继续?',
        '提示',
        {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }
      ).catch(err => err)
      //若果删除成功，返回值为字符串confirm
      //若用户取消删除返回cancel
      // console.log(confirmResult)
      if (confirmResult !== 'confirm') {
        return this.$message.info('已经取消删除')
      }
      const { data: res } = await this.$http.delete('roles/' + id)
      if (res.meta.status !== 200) {
        return this.$message.error('删除用户失败')
      }
      this.$message.success('删除成功')
      this.getRoleList()
    },
    //展示编辑用户对话框
    async showEditDialog(id) {
      const { data: res } = await this.$http.get('roles/' + id)
      if (res.meta.status !== 200) {
        return this.$message.error('查询用户信息失败')
      }
      this.editForm = res.data
      this.editDialogVisible = true
    },
    //监听修改用户对话框的关闭事件
    editDialogClosed() {
      this.$refs.editFormRef.resetFields()
    },
    //修改表单信息并提交
    editRoleInfo() {
        this.$refs.editFormRef.validate(async valid =>{
            if(!valid) return
            const {data:res}= await this.$http.put('roles/'+ this.editForm.roleId ,{
                roleName:this.editForm.roleName,
                roleDesc:this.editForm.roleDesc
            })
            if(res.meta.status !==200){
                return this.message.error('跟新信息失败')
            }
            //关闭对话框
            this.editDialogVisible=false
            //刷新数据列表
            this.getRoleList()
            //提示修改成功
            this.$message.success('修改成功')
        })
    },
    //根据id删除对应权限
    async removeRightById(role,rightId){
        //弹框提示用户是否删除
        const confirmResult=await this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }).catch(err=>err)

        if(confirmResult !=='confirm'){
            return this.$message.info('取消了删除！')
        }
       const {data:res}=await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
       if(res.meta.status !==200){
           return this.$message.error('删除权限失败！')
       }

    //    this.getRoleList()
    role.children=res.data
    },
    //展示分配权限对话框
    async showSetRightDialog(role) {
      this.roleId=role.id
        //获取所有数据
        const {data:res}=await this.$http.get('rights/tree')
        if(res.meta.status !=200){
            return this.$message.error('获取权限数据失败！')
        }
        //吧获取到的数据保存到data中
        this.rightslist=res.data
        console.log(this.rightslist)

        //递归获取三级节点的id
        this.getLeafKeys(role,this.defKeys)

        this.setRightDialogVisable=true
    },
    //通过递归的方式，获取角色下所有三级权限id，并保存到defKeys[]
    getLeafKeys(node,arr) {
        //如果 node 节点不包括children属性则是三级节点
        if(!node.children){
            return arr.push(node.id)
        }
        node.children.forEach(item=>{
            this.getLeafKeys(item,arr)
        })
    },
    //监听分配权限对话框的关闭事件
    setRightDialogClosed(){
      this.defKeys=[]
    },
    //点击为角色分配权限
    async allotRights(){
      const keys = [
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedNodes()
      ]
      const idStr=keys.join(',')
      const {data:res}=await this.$http.post(`roles/${this.roleId}/rights`,{rids:idStr})

      if(res.meta.status !==200){
        return this.$message.error('分配权限失败！')
      }
      this.$message.success('分配权限成功')
      this.getRoleList()
      this.setRightDialogVisable=false
    }

  }
}
</script>

<style lang="less" scoped>
    .el-tag{
        margin:7px
    }
    .bdtop {
        border-top:1px solid #eee
    }
    .bdbottom{
        border-bottom:1px solid #eee
    }
    .vcenter {
        display:flex;
        align-items: center;
    }
</style>
